Roller pulverizer



Nov. 18, 1930. R. E. DUNHAM ROLLER PULVERIZER Filed Feb. 23, 1928 3 Sheets-Sheet 2 Nov. 18, 1.930. R. E. DUNHAM 1,782,201

ROLLER PULVERIZER Filed Feb. 25, 1928 3 Sheets-Sheet 3 Patented Nov. 18, 193() i IJfNl'rr-.Dfy STATES RAY EIDUNH'AM, or nemen,4 oHIo, AssIeNoRmo 'THE DNHA coMrnNmoF ianrzfnh,A

f OHIO,- AcoRPoRATIoN or omo ROLLER rULviiinZiniis Ajiiction md February 23,1928'. serial im, 256,131.A Y

The presen'tinventionrelates to roller pul-Y ver'iZer'siof the type shown in the Dunham ReisSuePatntLNe, 13,921, of June 1, 1915,

although it Will be understood that theroller disks lwhich' more particularly form the novel features ofthe'present invention are applicable'ito roller 'pulverizers generally, either single" or'` double, and that the details of theV framework and mounting shown vserve rather to illustrate ,the applicability of the roller disks to pulverize generally thantoimpose particular limitations in the employment of such roller disks.

In roller pulverizers of thechara'cter comi monly in use, it is the practice at "the present time to [provide either a single rank or 4tvvo ranks of roller disks, each disk having a beveled edge formation, and the disks in unison constituting in effect a corrugated roller orfrollfers', as the casek may be, which passover the ground and' serve to cut, breakup,I and pulverizethe' clods yor lumps of earth, leaving,

ed condition. InA the `'case the surfac'eof the lield' in a rigid orcorrugatformation whichy materially improves the cntting, crushing,V andpulverizingqualities ofv the disks, and .at thel same time leaves the surface of the fieldv in a distinctively diferent condition, inthat the ridges or'pcorrugations are of irregular rather than straight forma'- i tion, 'which irregularity' in "theA ridges vand valleys formed in the ield'tends tofbetter prevent any scouring action by the'vvind'l or by the downow of Waterthanin thecalse Where thefridges a'nd valleys run' in a straight dithe disks wherein thefspokesf onthey opposite facesoft'hedisk are'arrangedi'n lstaggered relation tov one anether` which, rinconjunction With the undulating formation,y vaffords a stronger 'and more durable structural ar-p heretofore been emrang'ement thanv has ployed".

y yofthe presentinvent'ion, the disks, instead of havingtruly circular beveled cutting edges, are given .an pundu'lator'yf'edge Furthere objects ,andxdetails will appear from a description of the invention in conjunction With the accompanying drawings wherein- Y, j

Figure 1 is a face view of one Iof the disks embodying the featuresof the present invenf Fig. 2 is a sectional view taken on line 2 2 or Fig. 1;

' Fig. Bis a plan view of the disk mountings for a'double roller pulverizer showing a front roller rank of straight-edged disks with a'rear rankofjthe undulatory disks;

' Fig. l is an end elevation of thev saine ;v Fig. 5. is al plan view showing the employment of the undulatory disks inboth ranks;

and l c Fig. 6 is a plan view showing' the undulatory disks in the front rank with the straightedged disks in the rear rank.

Forpurposes of illustration, the disksare shown in connectionr with a double roller pulverizer "Which comprises a tongue 10 and a seatllmounted thereon, which tongue serves to connect rthe front and rear cross bars 12 and 13 of the frame. Each end of the frame has a depending fixed bracket 1&1 which serves at its, llovver end for the pivoting of an oscillatory frame bar 15 having an upstanding lug 16` Which receivesa pivot bol't17 for uniting the parts together. The oscillatory' frame bars afford journals for a front axle 18 and a rear axle 182 which axles freely carry the disks .which particularly form the subject matter'ofthe present,invention'.V ,It xis not deemed necessary to further describe. `the frame arrangement Which is shown ,merely forpurposes ofillustration and is'of a character Well understood in theart,

The'disk ofthe present invention comprises a rim 19 Which,in cross section, is of concaveconveii Wedgeshaped formation, the rimy Walls being concave on the exterior, and merging together into a cutting edge 20, Which,as best shown in Fig.A 2, is of undulatory configuration around thehp'eripherybf thedisk. UWiththe disks standing vertically in operative position, the cuttingedge Ywill curve alternva'telyvtoward one side and' then toward/theotherV side of the disks, so that'as a minimum, so that, with a given weight ofV a single disk is rolled over a field, it will produce an undulatory cut or groove in the surface conformable to the undulations in the periphery of the disk.

The disk is hollow, as shown, the interior configuration conforming substantially to that of the exterior, and the rim or periphery of the disk on each side terminates in a central opening 2l which is spanned on each sidel by a plurality of spokes 22, the inner ends of which merge into a hub 23. The arrangement.

of the spokes on each side of the wheel is such as to bring the spokes into staggered relation to one another, so that the support provided by the spokes will be more uniformly distributed around the periphery of the wheel than would be possible if thegspokes on one side were in register with those on the opposite side. n

VAs viewed from a given side of the disk, the outer ends of the spokes on that side merge into the rim, in each instance at a point where the undulations form a crest which most nearly approaches the points of connection for the spokes. In other words, in each in stance,the distance between the end of a spoke and the rim atthat point is at a minimum, as will be notedfrom an inspection of F ig. 2. ABy reason of thisv fact, the congura tion'of the disk as aV whole Vis one in which the degree of offset between Jthe spokes and the cutting edge will in each instance be at metal, greater strength and rigidity will be afforded than is the case of disks of the type Y ordinarily employed in roller pulverizers.

The staggered arrangement of the spokes, in conjunction with the manner in which the spokes are united with the rim, is of special importance in the present instance, in that the undulatory character of the cutting edge imposes a greater degree of lateral thrust against the rim than is the case with disk wheels of the ordinary configuration in which straight line grooves are formedin the-soil.

As illustrated, the present disks may be used on both roller gangs as in Fig. 5, or on the front gang only as in Fig. 6, or on the rear gang only as in Fig. 3. Where soil conifv ditions are such as to require a maximum amount of pulverizing action, it may be desirable toprovide both Vof the gangs with disks of the undulatory character.v Vhere it is desired to condition the field with straight implement advances, `the clods or lumps of shaft or shafts which carry them, they are free to'roll individually, so that in use there will be no uniformity in the alignment of the undulations of adjacent disks, with the result that instead of conditioning a field with uniformly yextending ridges or corrugations equally spaced from one another, the adjacent ridges will, in a more or less haphazard manner, approach and recede away from one another with no regularity in the spacing, which gives to the soil surface a non-uniformV finish in contradistinction from the uniformly corrugated straight ridged surface left by the passage of a roller pulverizer having disks of the usual type.

However, where it is desired to secure such uniformity, the older type of disks may be provided on the rear gang as in Fig. 6, in which case the front rank or gang of undulatory roller disks will be relied upon to perform the greater measure of crushing and depression, while the rear rank or gang will be relied upon to smooth out and uniformly oorrugate the surface, leaving the ridges in parallel lines.

VThe disks of the present invention are of a type to effect a greater displacement and disturbance of the soil than can be secured bythe use of disks having non-undulatory cutting edges, which increased displacement under the conditions indicated, result in a greater degree of abrasion and disintegration of the soil, which is highly desirable in the preparation of a seed bed.

- The arrangement is one which permits the disks of the present invention to be substituted for or used in conjunction with roller disks ofthe Vusual character on all machines now on the market, so that a farmer may employ combinations of disks in a way which will best meet the soil conditions encountered in various localities. A

I claim:

j 1. A roller pulverizer disk having a concavely beveled periphery forming a circumferentially extending laterally undulating cutting edge, the roller disk being hollow and provided on each side with spokes merging into'a centrally disposed hub, the spokes on one side being arranged in staggered relation with respect to the spokes on the other side, substantially as described.

2. A roller pulverizer disk having a concavely beveled periphery forming a circumferentially extending laterally undulating cutting edge, the faces of the periphery on each side of the cutting edge'being concavely curved, the roller disk being hollow and provided on each side with spokes merging into a centrallydisposed hub,4 the spokes on one side being arranged .in staggered' relation with respect to the spokes on the other side, substantially as described.

3. A roller pulverizer disk having a concavely beveled periphery forming a circumferentially extending laterally undulating cutting edge, the roller disk being hollow and provided on each side With spokes merging .into a centrally* disposed hub, the spokes on one side being arranged in staggered relation with respectl to the spokes on the other side, the outer ends of the spokes in each instance merging into the periphery at a point in alinement With the adjacent crest of one lof the undulations of the cutting edge, substantially as described.

4. A `roller pulverizer disk having aconcavely beveled peripheryy forming a circumferentially extendingy laterally undulating cutting edge, the faces of the'peripheryon each side of the cutting edge being concavely curved, the roller disk being hollow and yprovidedon each side with spokes merging into a centrally disposed hub, the spokeson one side being arranged in staggered relation with respect to the spokes on the other side, 'and the outer ends of the spokes in each instance merging into the periphery ata point in ralinement With the adjacent crest of one of the undulations ofthe cutting edge, substantially as described.

5. In a roller pulverizer, the combination of a frame, an axle carried by the frame,

y Ll() and a plurality of laterally adjacent contacting roller disks freely mounted lon the axle,

each of the disks being provided With a concavely beveled periphery having a laterally undulating cutting edge, substantially as described.

6. In a roller pulverizer, the combination of a frame, front and rear axles carried by the frame, and roller disks freely mounted upon the front and rear axles. in laterally adjacent and contacting relation, one Aof the groups of roller disks being provided With concavelybeveled peripheries having laterally undulating cutting edges, substantially as described. Y Y -l j 7. In a roller pulverizer, the combination of a frame, frontand rear axles carried by the frame, and roller disks freely mounted upon the front and rear axles in laterally adjacent and contacting relation, both of the groups offroller disks being providedwith concavely beveled peripheries having laterally undulating cutting edges, substantially as described.

. RAY E. DUNI-IAM. 

